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Finding the Fourth Proportional to 168.96, 251.36 and 158.72

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Solution

The fourth proportional to 168.96, 251.36 and 158.72 is: 236.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.96 : 251.36 = 158.72 : x
  2. Step 2: Convert to fraction form
    168.96/251.36 = 158.72/x
  3. Step 3: Cross multiply
    168.96x = 251.36 × 158.72
  4. Step 4: Simplify right side
    168.96x = 39,895.86
  5. Step 5: Solve for x
    x = 39,895.86/168.96
  6. Step 6: Final answer
    x = 236.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.